Stjmoto



Jun 2, 1925.

T. MATSUMOTQ STOVE Driicina]. Filed Feb. 5,

1.925 u F Z.

Patented June 2, 1925.

UNITED STATES PATENT OFFICE.

TORANOSUKE MATSUIVIOTO, OF OSAKA, JAPAN.

STOVE.

Application filed February 5, 1923, Serial No. 617,000. Renewed February 28, 1925.

To all whom it may concern:

Be it known that I, TonANosUKn MAT- sUMo'ro, subject of the Emperor of Japan, residing at No. 2292, Tennojimura, Higashinari-gun, Osaka, Japan, have invented certain new and useful Improvements in Stoves, of which the following is a speci fication.

This invention relates to a stove and it provides two sets of grates one above the other the upper one supporting the freshly supplied fuel and the lower one receiving partially consumed fuel and chips or dust dropping from the upper grate, where they are burned.

The object of'this invention is to secure such a combustion of fuel as will greatly conduce to economy.

Referring to the accompanying drawings:

Fig. l is a front elevation of the stove;

Fig. 2 is a section on the line A-s-B of Fig. 3;

Fig. 3 is a section on lines C-D, EF of Fig. 1;

Fig. e is a section on line G-H of Fig. 2.

The corresponding numbers of reference indicate similar parts.

he stove shown has a cylindrical outer ase 6 located on a base, 2, having an ash door 1. In the front side of the said outer case, is a fuel door, 7, having a damper for the admission of air to produce a down draft and a little lower an aperture, 8, for stirring the tire and further below is another door, 13. At the upper part, in the rack opens a smoke flue, 9. The top part of the base, 2, has a hole, l, and over the. hole is mounted the lower grate 5, and resting on such top part is an inner case, 3. Within the inner case is set the upper grate, 10, the

interstices of which are wider than those of the lower one, Below the upper grate the inner casing has draft holes, 11, made by cutting part of the inner wall between the upper and the lower grates and pressing the partially space betwee severed portions inward. The n the mner and outer walls or cases at the fuel and ash doors is bridged as 1s common by passages, 12.

The operation is as follows:

flame from b 7 Smoke and urnmg fuel on the upper grate will flow downward through the grate and pass through the vents,1l, and then ascend in the annular space formed by the outer and inner casing, walls escaping finally to the stack or Cmders and the upper gr chimney through the flue, 9. chips or dust dropping from ate will fall to the lower grate and there will be so perfectly burnt that they will be reduced to mere ashes. The hot products of combustion ascending in the whatever of consequently to the room.

outflow through the door, and no escape of smoke or fumes What I claim is: A stove having an outer case and an inner case spaced apart to form a smoke passage around the inner case, an upper grate, and

a lower grate that receives fuel dropping. from the upper grate, the products of combustion through the smoke passage serving to preheat fuel on the upper grate.

In testimony whereof I have hereunto allixed my si gnature. TORANOSUKE 'MATSUMOTO. [:L. s.] 

